Soviet shipbuilding gave water engines many legendary models, but few of them can boast the same survivability and recognizable design as Project 677This Kazanka with its distinctive beak has become a symbol of reliability for generations of fishermen and hunters. Even decades after mass production ceased, finding such a boat in good condition is considered a great success, and its operation still attracts a lot of interest from fans of classic motorcycle engineering.
Many people mistakenly think that it's just an old trough, not worthy of the attention of the modern user. metal-frame The AMG-5M alloy provides a resource that often outperforms modern Chinese counterparts, and in this article we will explore in detail why Project 677 remains relevant, what its hidden benefits are, and what to look for when buying or refurbishing.
If you're planning to buy this boat for yourself, you're going to have to deal with a number of technical issues that require careful consideration, from the condition of the skin to the right motor, every aspect of it affects safety and comfort. Let's dive into the history and technical details to see if it's worth messing with this water veteran these days.
History and concept of the project
Development Project 677 The project was conducted at the Kazan Gorbunov Aviation Plant in the late 1960s, and the engineers were tasked with creating a mass, cheap and easy-to-maintain motorcycle that could be manufactured at aviation facilities, with a focus on technology: the hull contours and kit design were designed to minimize the number of complex bent elements.
Unlike earlier models such as Kazanka or Crimea, the new project received more perfect contours. Project 677 It was designed to meet the requirements of the time for seaworthiness in large reservoirs, which is why the bow was raised, which allowed the boat to rise more confidently, but sacrifices were made in favor of ease of production, which affected the internal ergonomics.
The serial production was short-lived, but thousands of units were produced during that time, and the main consumer was not only private individuals, but also various economic organizations, fishing collective farms and rescue services. Aluminum alloy It allowed to achieve low weight, which made the boat transportable on a standard car trailer, although with some limitations in size.
- 🚤 The development was carried out on the basis of aviation stamping technologies.
- ⚓ The main goal was to create affordable transport for the mass user.
- 🌊 Improved seaworthiness compared to the predecessors of the Kazanka series.
⚠️ Note: When buying a Project 677 boat, pay special attention to the releases. The early series may have had differences in the thickness of the skin sheet, which is critical for durability.
Technical specifications and construction of the body
Structurally, the boat is a whole-welded hull from aluminum-magnesium alloyThis is key, as the use of AMG-5M (or its equivalents over the years) provides high corrosion resistance in salt and fresh water, and the skin thickness varies from 2 mm to 4 mm in the most loaded nodes, such as the zygomatic parts and the transom.
The dimensions of the boat allow four passengers to comfortably accommodate, although passport capacity is often limited to five people, taking into account equipment. Body length It's 4.5 meters, which is the optimal balance between capacity and transportation, and 1.65 meters wide, it's very stable, but it requires careful handling of the crew.
The design of the bottom is particularly noteworthy, and it's designed with a noticeable keel, which improves the course stability on the go, but flat-like contours in the aft can cause shocks to the wave when driving at high speeds with full load. Tranza The boat was originally designed for outboard motors with a capacity of up to 20-25 hp, which for modern realities is a rather modest indicator.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Longest length | 4,50 | n |
| largest width | 1,65 | n |
| Height of board | 0,75 | n |
| Mass without equipment | 170-180 | kilogram |
| Passenger capacity | 400 | kilogram |
Operational and seaworthiness
On the water. Project 677 It's predictable, but it's temperate, and it's got a nice little wave-cutting, but its low width down the bottom makes it sensitive to lateral agitation, and it can have a soft rolling, whether it's parked or slow, which is compensated by the presence of developed zygomatic keels.
The boat's capacity is both its strength and its weakness, and the spacious cockpit allows you to place trophies or camping gear, and on the other hand, when you're fully loaded (5 people + engine + fuel). height It becomes critically small above the water, and in such conditions, even a small swirling wave can lead to a dangerous roll.
The handling is directly dependent on the power of the engine installed. On a regular 15-20 hp, the boat is planing with only one or two passengers. motor-power It is desirable to raise to 25-30 hp, but this requires strengthening the transom, since the standard version may not withstand increased vibration loads.
To improve seaworthiness, install additional splash-jackers on the cheekbones - this will reduce the splashing of the cockpit at full speed.
It's worth noting that the aluminum hull is very noisy, rain, waves or just speeding creates significant acoustic discomfort, which makes the boat less suitable for quiet hunting from the approach, if you don't take measures to insulate.
Weaknesses and typical problems
Despite the legendary reliability, the Project 677 There are some design flaws that you need to be aware of, and that's the tendency to crack in welds, especially in the welds, especially in the mounting areas of the cans and stringers, and the vibration from the motor gets tired of the metal over time, and if you don't monitor the condition of the joints, you can get to leak at the wrong time.
The second problem is ergonomics: Hard aluminum cans (seats) have no backs and are extremely uncomfortable for long transitions. Accommodation scheme The passengers assume that everyone is sitting face to face or side, which is not always convenient, and the lack of a regular self-draining system requires manual pumping of water that has got inside through splashes or rain.
- ⚠️ Cracks in the corners of the transom and around the lower unit.
- 🔩 Weakening of rivet joints of the skin over time.
- 🌊 A low side at full load increases the risk of overcrowding.
⚠️ Warning: Never ignore small cracks on the bottom. In aluminum, they tend to grow rapidly under load, turning into through holes in one season.
Another nuance is that there are no regular hazelnuts, and you have to store everything in the cockpit or tie it to banks, which creates chaos and shifts the center of gravity, and many owners make their own sealants that serve as seats at the same time.
Modernization and DIY tuning
Owners of the six hundred and seventy-seven often resort to modifications to adapt the boat to modern requirements. transprancingInstallation of an additional plate made of stainless steel or duraluminum with a thickness of 6-8 mm allows you to safely use motors with a capacity of up to 30-40 hp, which radically changes the driving performance.
The second phase of modernization is usually about comfort: the owner cooks or glues the soft seats with high backs, often dismantled central banks, giving way to longitudinal runduks along the sides, not only increases usable space, but also improves stability, lowering the center of gravity of the cargo.
☑️ Planning to upgrade the 677
Some enthusiasts go further and change the design of the bow, welding the bowsprit or increasing the height of the board, but such interventions require a high skill welder and adherence to aluminum technology. Argon welding - a prerequisite for any repair or revision of the body.
Can I put a 40 hp outboard motor on the 677 project?
Theoretically, it can, but it requires a major alteration of the transom and possibly the bottom, the boat becomes unstable on the course and prone to yaw, the safe limit is 25-30 hp.
Comparison with competitors and modern analogues
Compared Project 677 With modern products, the picture is ambiguous. Modern Kazanka or Volzhanka often win in ergonomics and design, but lose as metal. The skin thickness of new budget models rarely exceeds 2 mm, while the old 677 often has 3-4 mm, which gives a huge margin of safety.
On the other hand, plastic boats (FRP) offer a whole different level of comfort: silence, complex contours, built-in tanks and handuks. However, plastic is afraid of hitting stones and requires careful treatment, while Project 677 aluminum can be “cured” with a hammer in the field. Repairability Aluminum in remote waters is its main trump card.
In the used boat price segment, the 677 is a workhorse niche, cheaper than good plastics, but more expensive than simple aluminum chuckles, and for those who value practicality over aesthetics, it's still one of the best options on the market.
The main trump card of the project 677 is thick metal and the ability to repair the boat by welding in any garage workshop, which modern thin-walled analogues do not have.
Frequently Asked Questions (FAQ)
What is the maximum power of the engine for the boat of the project 677?
The boat is designed for engines up to 20-25 hp However, subject to strengthening the transom and competent weighting, many owners successfully operate them with engines 30 hp Exceeding this power can lead to burrowing nose and reduced safety.
Do I need to paint the Project 677 boat?
Painting is not necessary to protect the metal, because the AMH alloy itself forms an oxide film. However, painting with epoxy or polyurethane paints makes it much easier to clean from dirt and stain, and also improves the appearance. The bottom is often painted with anti-fouling compounds.
How many people can the boat carry on the documents?
Passport capacity is usually 5 people, but this is with minimal equipment, a really comfortable long-distance accommodation of 3-4 people, when fully loaded, the free side becomes very low, which is dangerous in the excitement.
Where can I find the plans for Project 677?
Original factory drawings are hard to find, often in archives or collectors' offices, but there are many amateur diagrams and measurements on the Internet taken from surviving copies that are perfectly suited to reconstructing the basic elements of the set.